Nick Clegg is to call for a bail-like system of security bonds to tackle visa abuse today.
The Liberal Democrat leader will say that bonds would be paid as a cash guarantee from visa applicants who come in from high-risk countries, they would be repaid once the visitor leaves Britain.
In his first speech on immigration since he became Deputy Prime Minister, Mr Clegg will outline his vision for a "tolerant Britain, zero-tolerant of abuse" at the liberal think-tank, the Centre Forum.
It follows Ed Miliband's admission earlier this month that Labour "got [immigration] wrong" when they were last in power.
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His mother Princess Diana was killed in a car crash in Paris in 1997 when he was just 12 and his brother William was 15.
The 21-year-old, who was arrested on Sunday, also allegedly injured two other people in the attack in the German city of Reutlingen.
She was going to the aid of a family member who got out of the car in the middle of the park and was dragged away by a different tiger.